CN111237455A

CN111237455A - Double-layer welding vacuum corrugated pipe

Info

Publication number: CN111237455A
Application number: CN202010040237.8A
Authority: CN
Inventors: 孙艳朝
Original assignee: Liaoning Xitai Technology Co Ltd
Current assignee: Liaoning Xitai Technology Co Ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-06-05
Anticipated expiration: 2040-01-14
Also published as: CN111237455B

Abstract

The invention relates to the technical field of corrugated pipes, in particular to a double-layer welded vacuum corrugated pipe which also comprises a self-rolling steel bar and a rolling device, wherein when the self-rolling steel bar is in a stretching state, the cross section of the self-rolling steel bar is curved and forms self-support, a through hole penetrating through the inner end surface of a flange plate and the top of the flange plate is arranged on the flange plate, the position of the through hole on the inner end surface of the flange plate is positioned on the radial inner side of the joint of the end part of the double-layer corrugated pipe and the flange plate and is positioned in the upper half area of the flange plate, the rolling device is arranged at the top of the flange plate and close to the position of the through hole, the two ends of the self-rolling steel bar penetrate; the winding device comprises a box body, and the box body is covered on the opening at the top of the flange plate in a sealing manner. The self-supporting corrugated pipe does not need a spacer ring for supporting and can keep a long distance for self-supporting.

Description

Double-layer welding vacuum corrugated pipe

Technical Field

The invention relates to the technical field of corrugated pipes, in particular to a corrugated pipe capable of realizing self-supporting of a long-distance automatic corrugated pipe section, and particularly relates to a double-layer welding vacuum corrugated pipe.

Background

The corrugated pipe is a tubular elastic sensitive element which is formed by connecting foldable corrugated sheets along the folding and stretching direction. The corrugated pipe mainly comprises a metal corrugated pipe, a corrugated expansion joint, a corrugated heat exchange pipe, a diaphragm capsule, a metal hose and the like. The metal corrugated pipe is mainly applied to the effects of compensating the thermal deformation of a pipeline, damping, absorbing the settlement deformation of the pipeline and the like, and is widely applied to the industries of petrifaction, instruments, aerospace, chemical industry, electric power, cement, metallurgy and the like. The corrugated pipe made of other materials such as plastics has irreplaceable effects in the fields of medium conveying, electric power threading, machine tools, household appliances and the like.

When the corrugated section is long, in order to prevent the corrugated section from falling down due to self gravity, the middle of the corrugated section is provided with a spacer ring, the corrugated section is segmented by the spacer ring, and the spacer ring is supported respectively. In some cases, the corrugated pipe cannot maintain a horizontal linear state for a long distance without a spacer ring support seat at the corrugated section position.

Disclosure of Invention

In order to solve the above problems, the double-layer welded vacuum bellows provided by the embodiment may not need a spacer ring for supporting, may maintain a long distance self-supporting, and simultaneously may ensure the requirement of measuring the vacuum degree inside the double-layer bellows.

In order to achieve the purpose, the invention adopts the technical scheme that:

a double-layer welded vacuum corrugated pipe comprises a double-layer corrugated pipe and two flange plates arranged at two ends of the corrugated pipe, wherein a sealing structure is formed between the inner side end faces of the double-layer corrugated pipe and the two flange plates; the winding device comprises a box body, and the box body is covered on the opening at the top of the flange plate in a sealing manner.

Preferably, the through hole comprises a horizontal section and a vertical section, the horizontal section and the vertical section form an L-shaped structure, and the joint of the horizontal section and the vertical section is in arc transition.

Preferably, a rotating shaft is arranged in the box body, two ends of the rotating shaft are connected to the inner side of the box body through bearings, and the second end of the self-rolling steel bar is connected to the bearings.

Preferably, a guiding surface or a guiding surface is arranged in the box body towards the outlet of the vertical section, and the guiding surface is used for guiding the self-winding steel bar to the rotating shaft.

Preferably, a torsion spring is arranged on the rotating shaft and provides torque for the rotating shaft so as to realize the active storage of the self-winding spring by the rotating shaft.

Preferably, the axis of the rotating shaft is parallel to the width direction of the self-rolling steel strip.

Preferably, the cross-sectional shape and size of the through-hole are matched with the cross-sectional shape and size of the self-rolling steel strip.

Preferably, the section of the self-winding steel strip in the corrugated pipe is adjacent to the inner layer of the double-layer corrugated pipe.

Preferably, the corrugated pipe flange plate is provided with a vacuum detection interface, the first end of the vacuum detection interface is arranged on the inner side surface of the flange plate and positioned between the double-layer corrugated pipes, the second end of the vacuum detection interface is arranged on the inner side surface of the flange plate, and the second end of the vacuum detection interface is connected with a measuring nozzle used for connecting external equipment to measure the vacuum degree of a gap between the double-layer corrugated pipes.

The beneficial effects of the invention are as follows:

this bellows is through the characteristic of self-winding billet, for having certain strip of self-sustaining power, plays the effect of supporting the bellows when tensile state, and when the bellows shrink, the self-winding billet passes the through-hole and gets into to the storage device, and its switching state self-adaptation to form the support to the bellows, this bellows passes through the storage device that sets up respectively on two ring flanges, makes the effect of accomodating of self-winding billet better, and the reliability is also higher.

Drawings

Fig. 1 is a schematic drawing of a stretched structure of a double-layer welded vacuum bellows according to the present invention.

FIG. 2 is a schematic view of the contracted state of the double-layer welded vacuum bellows according to the present invention.

Fig. 3 is a diagram of a partial method of the part a in fig. 1.

FIG. 4 is a schematic view of the structure of the winding device in a contracted state of the self-double-layer welded vacuum bellows according to the present invention.

Fig. 5 is a schematic view of the flange and the support bars in a section taken along B-B in fig. 2.

Fig. 6 is a schematic top view of the winding device in the double-layer welded vacuum bellows according to the present invention.

The reference numerals include:

10-flange plate, 11-through hole, 111-horizontal section, 112-vertical section, 12-vacuum detection interface, 20-double-layer corrugated pipe, 30-self-rolling steel bar, 40-rolling device, 41-rotating shaft, 411-torsion spring, 42-guide area surface, 43-box body and 50-measuring nozzle.

Detailed Description

In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.

As shown in fig. 1-6, the double-layer welded vacuum bellows proposed in this embodiment includes a double-layer bellows 20, two flanges 10 disposed at two ends of the bellows, a sealing structure formed between the double-layer bellows 20 and the inner end faces of the two flanges, a self-rolling steel bar 30 and a rolling device 40, wherein when the self-rolling steel bar 30 is in a stretched state, the cross section of the self-rolling steel bar 30 is curved and self-supporting, a through hole 11 penetrating through the inner end face of the flange 10 and the top of the flange 10 is formed in the flange 10, the through hole 11 is located at the inner end face of the flange 10, is located at the radial inner side of the joint between the end of the double-layer bellows 20 and the flange 10 and is located at the upper half region of the flange 10, the rolling device 40 is disposed at the top of the flange 10 and near the through hole 11, the two ends of the self-rolling steel bar, the winding device 40 is used for receiving the self-winding steel bar 30 extending out of the first flange plate 10 into a roll shape; the winding device 40 comprises a box body 43, and the box body 43 is hermetically covered on the opening at the top of the flange plate 10 at the through hole 11, so that the through hole 11 does not influence the vacuum degree of the corrugated pipe. The width of the box 43 is substantially the same as the width of the flange 10 and does not protrude beyond at least the outer end face of the flange 10.

In this embodiment, from the tape in the similar coil of strip chi of structure of coil of strip 30, different departments are in that coil of strip 30 width is great, and crooked type radian is bigger during tensile state to play the effect that long distance supported, nevertheless should not the overlength from coil of strip 30, avoid collapsing and warp.

As shown in fig. 1, the present corrugated pipe is a double-layer welded vacuum corrugated pipe, and when the double-layer corrugated pipe 20 is stretched, the self-coiling steel bars 30 are mainly located inside the double-layer corrugated pipe 20 and attached to the inner side of the inner layer of the double-layer corrugated pipe 20, and they play a role of supporting the double-layer corrugated pipe 20.

As shown in fig. 2, in the case where the double-layer corrugated tube 20 is contracted, both ends of the self-winding steel strip 30 are mainly withdrawn into the take-up unit 40.

As shown in fig. 3, the through hole 11 includes a horizontal section 111 and a vertical section 112, and the horizontal section 111 and the vertical section 112 form an "L" shaped structure, and the junction of the horizontal section 111 and the vertical section 112 is an arc transition, and the arc transition forms a guiding structure for guiding the horizontally self-rolled steel strip 30 and the vertically self-rolled steel strip 30 to each other.

The corrugated pipe flange plate 10 is provided with a vacuum detection interface 12, the first end of the vacuum detection interface 12 is arranged on the inner side surface of the flange plate 10 and is positioned between the double-layer corrugated pipes 20, the second end of the vacuum detection interface 12 is arranged on the inner side surface of the flange plate 10, and the second end of the vacuum detection interface 12 is connected with a measuring nozzle 50 which is used for connecting external equipment to measure the vacuum degree of a gap between the double-layer corrugated pipes 20. When the inner layer or the outer layer of the double-layer corrugated pipe 20 leaks, the external device may measure whether the double-layer corrugated pipe 20 leaks by measuring the vacuum degree inside the double-layer corrugated pipe 20.

Be equipped with pivot 41 in the box body 43, this pivot 41 both ends are passed through the bearing and are connected at the box body 43 inboardly, and from rolling up the steel strip 30 second end and connecting on the bearing, can accomodate pivot 41 on from rolling up the steel strip 30, form and well accomodate.

A guide area surface 42 or a guide area surface 42 is provided in the box body 43 toward the exit position of the vertical section 112, and the guide area surface 42 is used for guiding the self-winding steel strip 30 to the rotating shaft 41, so that the self-winding steel strip 30 is guided to the rotating shaft 41 more smoothly.

The rotating shaft 41 is provided with a torsion spring 411, and the torsion spring 411 provides torque for the rotating shaft 41 so as to realize the active storage of the self-winding spring by the rotating shaft 41.

The axis of the rotating shaft 41 is parallel to the width direction of the self-rolling steel strip 30, so that rolling is facilitated, and twisting damage during rolling of the self-rolling steel strip 3030 is avoided. .

The cross-sectional shape and size of the through-hole 11 are matched with those of the self-winding steel strip 30. The through-holes 11 serve to smooth the self-winding steel strip 30 in a stretched state when the self-winding steel strip 30 is stretched.

The section of the self-rolling steel bar 30 in the corrugated pipe is adjacent to the inner layer of the double-layer corrugated pipe 20, so that the double-layer corrugated pipe 20 is prevented from being greatly deformed.

The foregoing is only a preferred embodiment of the present invention, and many variations in the specific embodiments and applications of the invention may be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the claims of this patent.

Claims

1. The utility model provides a double-deck welding vacuum bellows, includes double-deck bellows and sets up two ring flanges at the bellows both ends, forms seal structure, its characterized in that between double-deck bellows and two flange medial extremity: the double-layer welded vacuum corrugated pipe further comprises a self-rolling steel bar and a rolling device, wherein when the self-rolling steel bar is in a stretching state, the cross section of the self-rolling steel bar is bent and forms self-support, the flange plate is provided with a through hole penetrating through an inner end surface of the flange plate and the top of the flange plate, the through hole is positioned on the inner end surface of the flange plate, positioned on the radial inner side of the joint of the end part of the double-layer corrugated pipe and the flange plate and positioned in the upper half area of the flange plate, the rolling device is arranged at the top of the flange plate and close to the through hole, two ends of the self-rolling steel bar penetrate through the end part of the through hole and are arranged; the winding device comprises a box body, and the box body is covered on the opening at the top of the flange plate in a sealing manner.

2. The double-layer welded vacuum bellows of claim 1, wherein: the through hole comprises a horizontal section and a vertical section, the horizontal section and the vertical section form an L-shaped structure, and the joint of the horizontal section and the vertical section is in circular arc transition.

3. The double-layer welded vacuum bellows of claim 2, wherein: the box body is internally provided with a rotating shaft, two ends of the rotating shaft are connected to the inner side of the box body through bearings, and the second end of the self-rolling steel bar is connected to the bearings.

4. The double-layer welded vacuum bellows of claim 3, wherein: the position of the box body facing the outlet of the vertical section is provided with a guide surface or a guide surface, and the guide surface is used for guiding the self-rolling steel bar to the rotating shaft.

5. The double-layer welded vacuum bellows of claim 3, wherein: and a torsion spring is arranged on the rotating shaft and provides torque for the rotating shaft so as to realize the active storage of the rotating shaft on the self-winding spring.

6. The double-layer welded vacuum bellows of claim 3, wherein: the axis of the rotating shaft is parallel to the width direction of the self-rolling steel strip.

7. The double-layer welded vacuum bellows of claim 1, wherein: the cross section shape and size of the through hole are matched with the cross section shape and size of the self-rolling steel bar.

8. The double-layer welded vacuum bellows of claim 1, wherein: the section of the self-rolling steel bar in the corrugated pipe is adjacent to the inner layer of the double-layer corrugated pipe.

9. The double-layer welded vacuum bellows of claim 1, wherein: the corrugated pipe flange plate is provided with a vacuum detection interface, the first end of the vacuum detection interface is arranged on the inner side surface of the flange plate and is positioned between the double-layer corrugated pipes, the second end of the vacuum detection interface is arranged on the inner side surface of the flange plate, and the second end of the vacuum detection interface is connected with a measuring nozzle used for connecting external equipment to measure the vacuum degree of a gap between the double-layer corrugated pipes.